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https://github.com/tildearrow/furnace.git
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IT import: early ins/sample loading
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tildearrow
parent
51eb7bf710
commit
12a0e79ef8
1 changed files with 254 additions and 10 deletions
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@ -44,17 +44,10 @@ bool DivEngine::loadIT(unsigned char* file, size_t len) {
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ds.noSlidesOnFirstTick=true;
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ds.rowResetsArpPos=true;
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ds.ignoreJumpAtEnd=false;
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ds.pitchSlideSpeed=12;
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ds.pitchSlideSpeed=4;
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ds.system[0]=DIV_SYSTEM_DUMMY;
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ds.system[1]=DIV_SYSTEM_DUMMY;
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ds.system[2]=DIV_SYSTEM_DUMMY;
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ds.system[3]=DIV_SYSTEM_DUMMY;
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ds.system[4]=DIV_SYSTEM_DUMMY;
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ds.system[5]=DIV_SYSTEM_DUMMY;
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ds.system[6]=DIV_SYSTEM_DUMMY;
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ds.system[7]=DIV_SYSTEM_DUMMY;
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ds.systemLen=8;
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ds.system[0]=DIV_SYSTEM_ES5506;
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ds.systemLen=1;
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logV("Impulse Tracker module");
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@ -143,6 +136,114 @@ bool DivEngine::loadIT(unsigned char* file, size_t len) {
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for (int i=0; i<ds.insLen; i++) {
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DivInstrument* ins=new DivInstrument;
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logV("reading instrument %d...",i);
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if (!reader.seek(insPtr[i],SEEK_SET)) {
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logE("premature end of file!");
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lastError="incomplete file";
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delete ins;
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delete[] file;
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return false;
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}
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reader.read(magic,4);
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if (memcmp(magic,"IMPI",4)!=0) {
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logE("invalid instrument header!");
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lastError="invalid instrument header";
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delete ins;
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delete[] file;
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return false;
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}
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String dosName=reader.readString(12);
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reader.readC(); // 0
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unsigned char initCut=255;
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unsigned char initRes=255;
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if (compatTracker<0x200) { // old format
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unsigned char flags=reader.readC();
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unsigned char volLoopStart=reader.readC();
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unsigned char volLoopEnd=reader.readC();
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unsigned char susLoopStart=reader.readC();
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unsigned char susLoopEnd=reader.readC();
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logV("flags: %x",flags);
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logV("volLoopStart: %d",volLoopStart);
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logV("volLoopEnd: %d",volLoopEnd);
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logV("susLoopStart: %d",susLoopStart);
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logV("susLoopEnd: %d",susLoopEnd);
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reader.readS(); // x
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unsigned short fadeOut=reader.readS();
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logV("fadeOut: %d",fadeOut);
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// NNA/duplicate check - not supported by Furnace...
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reader.readC();
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reader.readC();
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// version/sample count/x
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reader.readI();
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} else { // new format
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// NNA/duplicate check - not supported by Furnace...
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reader.readC();
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reader.readC();
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reader.readC();
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unsigned short fadeOut=reader.readS();
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logV("fadeOut: %d",fadeOut);
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reader.readC();
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reader.readC();
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unsigned char globalVol=reader.readC();
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unsigned char defPan=reader.readC();
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logV("globalVol: %d",globalVol);
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logV("defPan: %d",defPan);
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// vol/pan randomization
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reader.readC();
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reader.readC();
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// version/sample count/x
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reader.readI();
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}
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ins->name=reader.readString(26);
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if (compatTracker<0x200) { // old format
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// x
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reader.readC();
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reader.readC();
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reader.readC();
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reader.readC();
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reader.readC();
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reader.readC();
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} else { // new format
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// filter params
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initCut=reader.readC();
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initRes=reader.readC();
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// MIDI stuff - ignored
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reader.readI();
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}
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logV("filter: %d/%d",initCut,initRes);
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// note map
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ins->amiga.useNoteMap=true;
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for (int j=0; j<120; j++) {
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ins->amiga.noteMap[j].freq=(unsigned char)reader.readC();
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ins->amiga.noteMap[j].map=reader.readC()-1;
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}
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// TODO: envelopes...
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ds.ins.push_back(ins);
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}
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@ -150,6 +251,149 @@ bool DivEngine::loadIT(unsigned char* file, size_t len) {
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for (int i=0; i<ds.sampleLen; i++) {
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DivSample* s=new DivSample;
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logV("reading sample %d...",i);
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if (!reader.seek(samplePtr[i],SEEK_SET)) {
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logE("premature end of file!");
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lastError="incomplete file";
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delete s;
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delete[] file;
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return false;
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}
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reader.read(magic,4);
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if (memcmp(magic,"IMPS",4)!=0) {
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logE("invalid sample header!");
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lastError="invalid sample header";
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delete s;
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delete[] file;
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return false;
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}
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String dosName=reader.readString(12);
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reader.readC(); // 0
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unsigned char globalVol=reader.readC();
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unsigned char flags=reader.readC();
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unsigned char sampleVol=reader.readC();
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logV("volumes: %d %d",globalVol,sampleVol);
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s->name=reader.readString(26);
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unsigned char convert=reader.readC();
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unsigned char defPan=reader.readC();
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logV("defPan: %d",defPan);
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if (flags&2) {
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s->depth=DIV_SAMPLE_DEPTH_16BIT;
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} else {
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s->depth=DIV_SAMPLE_DEPTH_8BIT;
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}
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if (flags&8) {
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logE("sample decompression not implemented!");
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lastError="sample decompression not implemented";
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delete s;
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delete[] file;
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return false;
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}
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s->init((unsigned int)reader.readI());
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s->loopStart=reader.readI();
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s->loopEnd=reader.readI();
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s->centerRate=reader.readI()/2;
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if (flags&16) {
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s->loop=true;
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if (flags&64) {
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s->loopMode=DIV_SAMPLE_LOOP_PINGPONG;
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} else {
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s->loopMode=DIV_SAMPLE_LOOP_FORWARD;
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}
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}
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if (flags&32) {
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s->loop=true;
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if (flags&128) {
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s->loopMode=DIV_SAMPLE_LOOP_PINGPONG;
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} else {
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s->loopMode=DIV_SAMPLE_LOOP_FORWARD;
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}
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s->loopStart=reader.readI();
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s->loopEnd=reader.readI();
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} else {
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reader.readI();
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reader.readI();
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}
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unsigned int dataPtr=reader.readI();
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unsigned char vibSpeed=reader.readC();
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unsigned char vibDepth=reader.readC();
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unsigned char vibRate=reader.readC();
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unsigned char vibShape=reader.readC();
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logV("vibrato: %d %d %d %d",vibSpeed,vibDepth,vibRate,vibShape);
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if (s->samples>0) {
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logD("seek to %x...",dataPtr);
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if (!reader.seek(dataPtr,SEEK_SET)) {
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logE("premature end of file!");
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lastError="incomplete file";
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delete s;
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delete[] file;
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return false;
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}
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} else {
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logD("seek not needed...");
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}
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if (s->depth==DIV_SAMPLE_DEPTH_16BIT) {
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if (flags&4) { // downmix stereo
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for (unsigned int i=0; i<s->samples; i++) {
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short l;
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short r;
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if (convert&2) {
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l=reader.readS_BE();
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r=reader.readS_BE();
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} else {
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l=reader.readS();
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r=reader.readS();
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}
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if (!(convert&1)) {
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l^=0x8000;
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r^=0x8000;
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}
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s->data16[i]=(l+r)>>1;
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}
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} else {
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for (unsigned int i=0; i<s->samples; i++) {
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if (convert&2) {
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s->data16[i]=reader.readS_BE()^((convert&1)?0:0x8000);
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} else {
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s->data16[i]=reader.readS()^((convert&1)?0:0x8000);
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}
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}
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}
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} else {
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if (flags&4) { // downmix stereo
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for (unsigned int i=0; i<s->samples; i++) {
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signed char l=reader.readC();
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signed char r=reader.readC();
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if (!(convert&1)) {
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l^=0x80;
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r^=0x80;
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}
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s->data8[i]=(l+r)>>1;
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}
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} else {
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for (unsigned int i=0; i<s->samples; i++) {
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s->data8[i]=reader.readC()^((convert&1)?0:0x80);
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}
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}
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}
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ds.sample.push_back(s);
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}
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